Here's where I'm at with the train, I picked this train (FCC 313 Moogate - Hertford North) because it's actually one of the units that I worked on during last year, I was part of a team that refurbished the entire fleet of this type of train, so it seemed the obvious choice to try and replicate for my story.

Need to finish off the under carriage and do a bit of work on the ends. And build all the seat inside. Then duplicate it and modify to create the drivers end carriages.